We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Subject / Started by Last post
0 Replies
475 Views
Last post February 06, 2022, 0413 UTC
by ~SIGINT~
1 Replies
491 Views
Last post September 20, 2022, 1943 UTC
by Ron - Calif.
0 Replies
286 Views
Last post January 21, 2023, 1321 UTC
by ~SIGINT~
0 Replies
362 Views
Last post April 13, 2024, 0138 UTC
by ~SIGINT~
1 Replies
453 Views
Last post September 19, 2022, 1501 UTC
by Ron - Calif.
1 Replies
568 Views
Last post February 23, 2024, 1426 UTC
by ~SIGINT~
0 Replies
412 Views
Last post July 02, 2022, 0347 UTC
by ~SIGINT~
0 Replies
372 Views
Last post April 13, 2024, 0128 UTC
by ~SIGINT~
0 Replies
251 Views
Last post September 17, 2023, 0140 UTC
by ~SIGINT~
1 Replies
457 Views
Last post September 19, 2022, 1004 UTC
by Ct Yankee
0 Replies
332 Views
Last post August 13, 2022, 1229 UTC
by ~SIGINT~
1 Replies
308 Views
Last post July 17, 2023, 0447 UTC
by Shortwave_Listener
0 Replies
277 Views
Last post January 19, 2023, 1403 UTC
by ~SIGINT~
0 Replies
298 Views
Last post September 16, 2023, 1316 UTC
by ~SIGINT~
2 Replies
527 Views
Last post December 18, 2022, 0033 UTC
by ~SIGINT~
0 Replies
272 Views
Last post July 14, 2023, 1151 UTC
by ~SIGINT~
0 Replies
527 Views
Last post March 03, 2022, 1509 UTC
by ~SIGINT~
0 Replies
339 Views
Last post November 26, 2022, 0404 UTC
by ~SIGINT~
0 Replies
269 Views
Last post August 01, 2023, 0029 UTC
by ~SIGINT~
0 Replies
245 Views
Last post July 31, 2023, 2028 UTC
by ~SIGINT~

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns